Steamed bao buns are made by proofing a yeast-based dough, shaping it into buns, and then steaming them until fluffy and cooked through. The key is a soft, slightly sweet dough and a hot, humid steaming environment.
Detailed Explanation:
Making steamed bao buns involves several key steps:
- Prepare the Dough: Combine flour (typically a mix of all-purpose and cake flour for a softer texture), sugar, yeast, baking powder, milk, water, and oil in a bowl or stand mixer. Knead until a smooth, elastic dough forms. The sugar feeds the yeast and contributes to the bun's characteristic sweetness.
- First Proof: Place the dough in a lightly oiled bowl, cover, and let it rise in a warm place until doubled in size (about 1-2 hours). This allows the yeast to ferment and create air pockets, resulting in a light and airy bun.
- Shape the Buns: Punch down the dough to release the air. Divide the dough into equal portions (e.g., 50-60g each). Roll each portion into a smooth ball or flatten into an oval shape. You can fold the oval in half to create a classic bao shape or leave it as a round bun. If adding filling, flatten the dough, place the filling in the center, and pinch the edges to seal.
- Second Proof: Place the shaped buns on squares of parchment paper (this prevents sticking) and arrange them in a steamer basket, leaving space between each bun. Cover and let them rise again for about 30-45 minutes. This second proof is crucial for achieving a truly fluffy texture.
- Steam the Buns: Bring water to a boil in a steamer. Place the steamer basket with the buns over the boiling water. Cover the steamer tightly and steam for 12-15 minutes. Avoid lifting the lid during steaming, as this can cause the buns to collapse.
- Cool and Serve: Once steamed, turn off the heat and let the buns sit in the steamer for a few minutes with the lid slightly ajar. This prevents them from shrinking due to a sudden temperature change. Carefully remove the buns from the steamer and serve warm.
Pro Tip:
To prevent the bao buns from becoming soggy, wrap the lid of your steamer with a clean kitchen towel. This will absorb any condensation that drips back onto the buns during steaming.